n | a(n) |
---|---|
1 | 6 |
2 | 12 |
3 | 36 |
4 | 96 |
5 | 264 |
6 | 720 |
7 | 1968 |
8 | 5376 |
9 | 14688 |
10 | 40128 |
11 | 109632 |
12 | 299520 |
13 | 818304 |
14 | 2235648 |
15 | 6107904 |
16 | 16687104 |
17 | 45590016 |
18 | 124554240 |
19 | 340288512 |
20 | 929685504 |
21 | 2539948032 |
22 | 6939267072 |
23 | 18958430208 |
24 | 51795394560 |
25 | 141507649536 |
26 | 386606088192 |
[6,12,36,96,264,720,1968,5376,14688,40128,109632, 299520,818304,2235648,6107904,16687104,45590016, 124554240,340288512,929685504,2539948032, 6939267072,18958430208,51795394560,141507649536, 386606088192] |